| 摘要 |
A thermal printer has a conveyor roller set and three thermal heads along a feeding passage. In feeding a recording sheet, a pinch roller is deformed by pressing force of a capstan roller. In addition, platen rollers are also deformed by respective thermal heads. The feeding passage is bent to form V-shape at the feeding roller set and respective thermal heads, so the recording sheet is prevented from waving. By bending the feeding passage, the recording sheet is prevented from waving, so deviation in feeding speed is decreased even when the load to the recording sheet is changed. Moreover, since all thermal heads press the recording sheet simultaneously and are retracted to decrease the pressing force gradually after thermal recording, it is possible to decrease deviation in the load to the recording sheet.
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